Identification of channels and associated signal information contributing to a portion of a composite eye diagram

(19)

(11)

EP 1 348 973 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.04.2004 Bulletin 2004/16

(43)	Date of publication A2:
	01.10.2003 Bulletin 2003/40

(21)	Application number: 03251384.8

(22)	Date of filing: 07.03.2003

(51)	International Patent Classification (IPC)⁷: G01R 31/319

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
	Designated Extension States:
	AL LT LV MK

(30)

Priority:

28.03.2002 US 109282

(71)	Applicant: Agilent Technologies, Inc.
	Palo Alto, CA 94306 (US)

(72)	Inventors:
	Nygaard, Richard A., Jr. Colorado Springs, CO 80918 (US) Haeffele, Jeffrey John Monument, CO 80132-8154 (US)

(74)	Representative: Jackson, Richard Eric et al
	Carpmaels & Ransford, 43 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)

(54)	Identification of channels and associated signal information contributing to a portion of a composite eye diagram

(57) An eye diagram analyzer can assign a plurality of SUT data signals to be members of a labeled group (6) of channels. There may be a plurality of such groups. The measured data for components within a group can be merged according to various different modes into a composite eye diagram presentation (12). When a composite eye diagram is being displayed, the operator may position a screen pointer (cursor) (17) over some interesting part of the eye diagram, and the analyzer will display a list (23) of those channels that contributed to the displayed pixels in that part of the eye diagram, as well as other related information. The operator may also select (31) a channel from among the group, and then have the displayed pixels for which it is responsible be displayed in a selected color or otherwise highlighted (32) in a way that allows them to be distinguished from all others.

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